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Finding the Fourth Proportional to 17,961.51, 24,761.16 and 12,639.81

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Solution

The fourth proportional to 17,961.51, 24,761.16 and 12,639.81 is: 17,424.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,961.51 : 24,761.16 = 12,639.81 : x
  2. Step 2: Convert to fraction form
    17,961.51/24,761.16 = 12,639.81/x
  3. Step 3: Cross multiply
    17,961.51x = 24,761.16 × 12,639.81
  4. Step 4: Simplify right side
    17,961.51x = 312,976,357.78
  5. Step 5: Solve for x
    x = 312,976,357.78/17,961.51
  6. Step 6: Final answer
    x = 17,424.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.